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Figure 2 Left: a two-dimensional sheet with 9-membered rings, the fundamental building block (FBB) marked by a dash-line ellipse; Right upper: a 9-membered ring with a nearly equilateral triangular motif; Right down: coordination environment of Ce in a 1–6-3 crown-shaped polyhedron.

Journal logoCRYSTALLOGRAPHIC
COMMUNICATIONS
ISSN: 2056-9890
Volume 68| Part 2| January 2012| Page i17
doi:10.1107/S1600536812002875
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